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PFW1546: Model 590 and model 595 memory problem isolation procedure

Use this procedure to locate defective FRUs not found by normal diagnostics.

Purpose of this procedure

Use this procedure to locate defective FRUs not found by normal diagnostics. It should be used when the service processor posts a failure and halts the IPL before server firmware standby is reached.

To perform this procedure, run diagnostics on a minimally configured system. If a failure is detected on the minimally configured system, the remaining FRUs are exchanged one at a time until the failing FRU is identified. If a failure is not detected, FRUs are added back until the failure occurs. The failure is then isolated to the failing FRU.

This memory problem-determination procedure isolates memory subsystem failures. When memory problem isolation is complete, memory cards exhibiting a failure will have been reseated or replaced.

Notes:
  1. The service processor might have recorded one or more symptoms in its error/event log. Use the Advanced System Management Interface (ASMI) menus to view the error/event log.
    • If you arrived here after performing a slow boot, look for a possible new error that occurred during the slow boot. If there is a new error, and its actions call for a FRU replacement, perform those actions. If this does not resolve the problem, go to PFW1546-1.
    • If an additional slow boot has not been performed, or if the slow boot did not yield a new error code, look at the error that occurred prior to the original error. Perform the actions associated with that error. If the problem is not resolved, go to PFW1546-1.
    • If a slow boot results in the same error code, and there are no error codes before the original error code, go to PFW1546-1.
  2. The service processor might have been set by the user to monitor system operations and to attempt recoveries. You might want to disable these options while you diagnose and service the system. If these settings are disabled, make notes of their current settings so that they can be restored before the system is turned back over to the customer. The following settings may be of interest.
    Setting Description
    Monitoring (also called surveillance) From the ASMI menu, expand the System Configuration menu, then click on Monitoring. Disable both types of surveillance.
    Auto power restart (also called unattended start mode) From the ASMI menu, expand Power/Restart Control, then click on Auto Power Restart, and set it to disabled.
    Wake on LAN From the ASMI menu, expand Wake on LAN, and set it to disabled.
    Call Out From the ASMI menu, expand the Service Aids menu, then click on Call-Home/Call-In Setup. Set the call-home system port and the call-in system port to disabled.
  3. If this is a pSeries® system, verify that the system has not been set to boot to the SMS menus or to the open firmware prompt. From the ASMI menu, expand Power/Restart Control to view the menu, then click on Power On/Off System. The AIX/Linux partition mode boot should say "Continue to Operating System".
Parent topic: Problems with loading and starting the operating system (AIX and Linux)
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Last updated: Fri, Oct 30, 2009